The Merchant Shipping (Returns of Births and Deaths) Regulations 1979

Birth and death in ship not registered in the United Kingdom

4.  Where—

(a)a citizen of the United Kingdom and Colonies is born or dies in a ship not registered in the United Kingdom; and

(b)the ship thereafter calls at a port in the United Kingdom in the course of or at the end of the voyage during which the birth or death occurs

the master of the ship shall make a return of the birth or of the death in accordance with regulations 5 and 6.